The fact that you have one of the most emotionally moving scenes in the trilogy and then play it for laughs in the very next scene really kills the power the Alfred/Bruce confrontation has.

I think that was just a simple reaction of Bruce being so accustomed to Alfred. Did it never happen , when you don't sleep at home , and you wake up and think you're on your room ? Yet when you see you're in some other place there's this moment of trying to understand "where the hell am I "? Its the routines of our bodies and minds adapting to a new situation. To me the scene plays like that.